Internal pipe-gripper.



S. R. MGGGNNELL. Hmmm am APPLIOATOH FILED fateme fang. 1913.

@tto/warg 5 E. lfcCOiTELL, QF VICHIT FALLS, TEXAS.

Specification of Letters Patent. gli-92mg@ xwg 5? g :En

I l] L s l ppioaticyn flied January 22, 1913. Serial No. 'T4-23.521315.

` "Edi, oleo?, emot dose-rip mfenioi, siioo. as Wild onabe .in am to While-ii' it appori oso ie somo,

in ooyoo o iii@ izwoo'ioii is io, provide an.. impro/ved oim of? gsi spoof, Wiofoby o. Wii oosing may bo sooiifoiy heid Wiiodrown from o Weil Another objeo of igiioiiivozitioii is io, pro,- vido gripping ooi o-fhis Charset-4e?, by moons of which one sseoiiozi of pipe Lay bo employed for raising anoioi seoiioo of 1o-ipo vvhicii has become doached;

Anoiier object of ho iiveniozi is io vproY vide :i @ripping devi/co of Jihis ohomotoi: which is easily disengagod from ibo pipe in the event imi it is found impossible oxtreiooiy di [c o remove soi'pipe.

difei obieois :ind odvanages may' be rexoitoni hereinafter :md in the claims.

In ih@ accompanying drmvingj1 which suppiemou iho following specicaiion, Fig# uro l is oievziiion view of myimproved gripping ioni. i2 is :i fragmeniary seo. ioimi i'iow of a Woll Casing. :and showing on im oniziigod scolo. a section through ih@ ilppoi' portion of 'the gripping ooi as seen 'on the iin@ 2-2 of Fig. l. Fig. f3 isV a'ragf. memory sectionai View of a weli casing, and showing' on'iiio sam@ .s0-oie. a section through auoiiioii por-ion of ihe gripping tooi as seen on ibo iin 33 of Fig. 1. Fig. 4 is a Seoiioimi -i'ioi-.Y on die iiiie -#i of Fig. l.

In oeso drawings, in which simiiar refer sumo chai-aciers designato corresponding parts throughout the several Views. the numeial 5 desigiaaos die iowei end of a section of 'pipe or Weil casing, and the Romeral 6 designates ho apparenti of 'a simiiar Weil ajsiog for ih@ piiiiposo of iihisiaing my mvenioii, i'

yiiction between the This izivoii-.ion coiiipi'ises :in upper seoiioii,' :is shown in Fig: Q. :iiid a iowor section, as shown in Fin. 3; tiiofoweif seoion boing inoriiaiiy. @mood-od at "(7 and @he owor und of iii-o oppei sooioi'i boing oX'iaii-y screwiiil'eodod 1- 8, and. odapod io engage Wii ihohieaded poiion as shown in l. iioupper seoion may be pro-vided with any props? meaiis, orsecuriiiffi it so a. suspendingor ifing comiooiion no shown), said maas-boingindicaiod oy abo sooW-heads 9. The lower Sooioii consists of a spoor sioment l0, anew-ivo?.y il, :i drow rod l', jaws i3, :a spoor 1%. and spying-grossed stop feiemenis 15i tile aioi: boing pivood at lh sooodin aporiu'es l? of tho spear sie mont, andv adopted be' dopifessod Within iiioA apoiiiros i7?. ogains ibo action of' die spii-ugs i8. lie spear element is couiraly apor'uyod thi'oughout its ogifoi portionjfor 'ihe reoepiioii of ho draw rod id, this rod having' iis upper end in screwbloodedr engagement Wi iheimt o? Swix-oi eiomoii 11.' The iowa? eind or he swivei element is oen- "traiiy apeifiiied otl, for the reception of' o boss Jl formed on he upper ond o' the spoor ei'emeii, said boss being provided' with i peripbozal -ooife 2l. for zo rocepion of retaining; scrows, which are sooui'od in ibo swivelv element and eroi giooi'vo, so.' i'hat the swivel element bo rotated around Said bosst bot heid against long-iudiiial movement ihcioori. Bail bearings 255 vmay be provided' foi` decreasing ho swivei element and he spear element and, in order to, further decrease the friction and reduce it to :i minimum, l provide on oii chamber 24 inthe upper portion of 'the obvious that oii from die chamba? 24 Wili bo exsiid into said periplo- 5 swivel (demoni. it is" fed, by gravity and by Capiiiary fitraoion between the smew-hroads of the swivei oiemeii and the draw rod 12, so as to hibrioaio ho boli bearings 23, the peripheral groove and the convexed surface of the boss 20.

The lower portion of the spear demoni 10 is provided with javseating elements Q5, formed with parallel shoulders 26. between which are seated tho jaws 13, said jaws being provided with upwardly inclined and sharp ieeth, ond boing aporturod at 26 for the ieoepiiin of studs 2T; said Siids being formed which receives the draw rod 12, and in this y or secured on the lower end ofthe draw rod i2. Between the shoulders 26A are the gawseats Q8, which arel upwardly-1ncl1ned toward thvairis of 'the swivel member, so that the few-seatingelement is wedge shaped, and converging iipwardly- Tliisjaweeating element is provided with a relatively large aperture, communicating with tlief aperture relatively large aperture, the lower of the rod. 1Q and tlfie' studs 27 lieve considerable room to move up and down, so that tbe' as for instance, by screw-threaded engagement. with the element as indicated at .V. 'When a casing has neen inserted in a Well, havingl been driven or packed therein, it is usually held' very tightly, by memes of the surrounding earth and rocks, and therefore, it becomes necessary to jai; and jerk the pipe, for the porpose of disengagingit.-

Therefore, it is'neeesa-ryto provide the yar elements 30, 31 and 32. The jar element 30 eonsibts of Atlie binrcated' extension of 'the jaw-seating element 33, while the element 32 extends between fthe intentions 30, and .is provided with a ,rectangular and elongated vertical aperture 34, in which is slidably. seated tbe-element Si, the latterlbeing secured between tbe ends oi the ureations 30, as indicated by the bolt 35, which may either constitute a pivotal o' a rigid securing means, es desired. Tlid,r element 33 is providedwith dove-teil da?? seats 36, in which are slid'ably seated the jaws 37, wni-eli have downwardly inclined sharp teeth 37.

It will be seen that if the element 32 isA lielfl stationarj.7 While the element' 3i) is moved downward, the block 31 will m ve downward in the slot- 34, While the doWnwarclly converging element 33 will have rel ative movement to the jews 37, thereby separating tlie jaws said jaws bei-ng supported by lat-eral extensions 38, Whieliere formedl or secured on the upper end oil the element :ind constitute jaw-actuating elements;

lluring tbe operation of drilling a ivell, tbe drilling tool is often deflected byrorr tact. with a bonlderor' slanting ledge, which causes the well to be ont o vertical aline nient/,and therefore, when toe easingis insei-tod, it. is likely,1 .to become disconneted at one or more of the joints, owing to its contact with said bonldei or ledge, and tbe necessary bending of the easing in contorming to the shape 4oi the well.A ll'ioreover, it 'requently occurs that: aiter a well 'has been drilled to a very considerable depto, the en, pee-ted result in obtemmg Wateror oil is' not attained, rid tl'ierefoil'e, tbeoasing must ei lier be extracted from the Awell -OI lost.

.eauleing'tlie teeth. 13' to bite deeper into the.

gaseoso in attempting to'removexlie Casing in seetions,it sometimes oecurstliat dirt and stones will be dislodged from the side of the Well, and will cover the cesingwhicli remains in thewell, so that it is impossible to grappleA or grip the remaining Casing for removing it It is contemplated by the present invention, Yto overcome the oregoing ditliculties,

in the followingmanner': When it is desired to remove aswell easmgtlie-speer and swivel elements shown 1n Fig". 3 are employed-for raisingftlie top section opipe suiiiciently to be grasped oye pipe jacl; (notsliown) whereupon tbe rests l5 ere depressed, so that the spear end swivel, element may be lowered through the pipe, 'if the .pipe-is seperated et any place, the upper section baring been previfnislj,7 lifted, there `will exist a space between tlie upper end lower sections, so that the; rests 5,'-after-passing through the upper section," outward into the positionsliown in Fig. 3g

will beforeed4 so that, when 'the spear element has been lowered sufficiently, .it will be arrested by v'Contact of said rests Witli the' top, of the lov-ver section (see'Fig. 3). Ae this stage 4of 'theope-ration, it is desired" tojgresp this.

lower section'and liftis slightly, for the purpose of aseertainingivlietber the pipe isf disconnected at any other place tlierebelow,

and after thus raising ibis section, aring 39 may be lowered into position. around' the; spear element, so as to depress Lilie 'rests l5,- wlien 'the spear is slightly raised, so. that. tlie' spear may ther:l descend through this lmve'r casing section, leaving: the ring on top of, said easing section. llf'lien tbe spear has been suiciently loivered, it'will'agzain 'rest upon the upper end of a pipe section which has been disconnected. and tlie last-'said pipe section may loe. slightly raised,jt`or the purpose of locatingotber disconnected' places in the casing. Ingrippingibe pipesections, c.

for the purpose ,oi raising-them; the swivel element l1 is rotated, tliroiigli .the medium oits suspending element, in contre-cloel;- wise direction, so as to toreo the draw rod 12 lio" downward. and therebl'v foire tlie'jaivs downi Ward on the Wedge shaped jaivI-seating ele-A ment,.se as to separate tbe}a\ifs and 'torce face -ot the pipe section, tlins giving t-lie janv teeth 13 an ii'iitiator)r hold or bite in the easing. The spear now raised, 'ind the Weight of tbe easing dravvsi the jaws iai tlieij, down upon thewedge shaped portion '25, against tlie action oftliees'pri-ig 12"A thereby 'further 'separating jtlie`ia'wsand them into engagement with tlig, iniierfsmh with the easing. Blow., eseuniingthat the pipe easing is to he extracted, and has had its several sections separated, described in tlieoregoing; the upper and lower seetions of my improved gripping tool are secured together, as shown in Fig. l.. The tool is noiv lowered through the easing until the rests l5 are seated on the lower section 6, whereupon 'the jaws 13 are broughtinto grii'iping engagement, as described` and then the jaw seating element 33 is'alloived to xlescend until it has forced the jews 3T into gripping engagement with the opper pipe section. The sustaining element may then he disengaged from 'the sereni-threads or disconnected at its upper end and allowed to fall into the Casing, whereupon, the seid pipe jack, or other propervmeans may he setl into operation for raising the upper section of easing, so that the jaws 3T ar fort/ed into more positive gripping conte-ct with the upper section of casing, ani ,the grip ping tool now constitutes a coupling or conneetion between the Lipper and lower seetions of casing. As the easing is raised, itv may he disjointed and remoretl from the sections which are being raised, until the gripping tool has heen drawn snti'ieiently above the surface of the ground to allori'7 the lower section to he engaged by the pipe jack, whereupon the tool may loe removed,

described.

Obviously, if the easing` is found 'to lie diseonneeted in several places. one or mj:

improved gripping tools may he employed for each disconnected portion; the loiver gripping tool 'being seated into gripping Contact. and then the next lowen and so on until all of the sections have been connected, as described.

It will'be seen that lliave provided a `devioe of this character which is full;Iv rapable of attaining the 'foregoing objects. and in a thoroug ily practical and eiiieient manner.

l do not limit my intention to the exat details of construction and colnbination'ziiid arrangement. of parts, as herewith illustrated and described, but my invention'mayv oni)v be limited by a reasonable interpreta tion of the following Claims.

l. In a pipe gri ng tool. a spear element having an upwardly inclined javfseatinff element. toothed and apertnred jaws slidalily seated for vertical movement on said jaw-seating element, studs slidablr seated in the apertures of the jawn a draw rod engaged with the studs and extendingr npivardlv through a ventral aperture of the spear element, a swivel element mounted tor .rotargt1 movement on the spear element, means for holding the swivel element against longitudinal movement relative to the spear element, and depressilole supporting elements carried hv the spear element, Seid tirar.' rod being in srreu`-threaded engagement with the sivivel element l'or movnig the studs and ther-ehir moring the jaws l upon the ui'nvartlly inclined jaw-seating elenient for towing the jaws into engagement with a pipe or t'asinq, substantially as de sti'ilietl. Y- f 2. in a pipe gripping and raising tool. a spear element havin;1 a vrrtital aperture therethrough and having recesses in its outer sui-fare, said spear element including :in 'ui'ii'v'ardly inclined jaw-.seating element, jaws hazing upwardly direrted teeth mounted for vertical .movement on the upwardly inclined jaws-eating' portion. a draw rod extending' through the `vertical aperture ot the spear element7 means eope 'ating with the draw rod for moving the jaws upon the inclined jimi-seating element rests seated in ed to extend from the recesses into Contact e swivel element in serew-tlireatled engagement with said dran rod and adapted to move said draw rod longitudinally thi ough the spear element.

E3. in a tool ot' the character described, a spear element having gripping means associated therewith. Said spear e'leI'ne-nty having a. vertical aperture therethrough. a draw roil extending througn the vertical aperture and engaging the igrippinglj` means for operating` the latter, a swivel element ir screw-*hrended engagement with the draw rod` and an oil chamber in the upper part of the swivel element, said draw rod extend imgr into saidl oil chamber, so thaty oil may be feti by gravity and Capillary attraction around the screw-threaded end of thev rod, for thoroughly .lubricating the swivel element. 4l. ln e device of the Character described. a spear element having a vertical aperture and haring a oo ss through which the vertical aperture extends, pipe grippingineans associated with the spear element, a draw rod Connected lwith the pipe grippingineans for operatingI the latter, seid draw rod having its opper end screw-threaded, a swivel element having: an aperture into whieh the aperture in engagetinent with the'threadeil end of the draw rod, said Swivel element beingr provided with an oil chamber in con munieation with the screw-threaded aperwith the upper end of a pipe or easing, andy boss of the spear element is rotatably seateth' said swivel element ha ving a screnwtlirezuleil' ture. so that oil may he fed of; capillary atv S5 the reeesses ot the spear element and adaptspear. is withinhe wellk 'mtogr ping-Contact with; .a A,pipe casng,' .depies le res'svfr Contact4 with' thc; top

of u casing section and holding the, spear during 4theopewliun4 of gripping; und yme'ansfor. depressingthe rests while th Itwo subscribing witnesses, v

In testimony whereof I hav sign'd my Al nameto this -specficatin in 'the presenc'e pf' 

